de León, H., Ramírez, E., Martínez, G., Oyervides, A. and de la Rosa, A. (2006) “Evaluation of heterotic patterns in developing maize hybrids for middle-altitude regions of Mexico”., Agronomía Mesoamericana, 10(2), pp. 31–35. doi: 10.15517/am.v10i2.17932.